Cheap Flights from San Juan (SJU) to St. Marys (KSM)

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to St. Marys, AK (KSM)

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM) cost?
Get a cheap one-way flight or cheap return flight from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM)?
is the most affordable month to fly from SJU to KSM. Timing your trip outside of the busy season is often the key to better flight prices.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SJU to KSM flight.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM)?
There are no daily nonstop flights available from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from SJU to KSM?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on various factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM)?
Opt for a flight from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM) last-minute?
Booking your flight from SJU to KSM shortly before your journey is usually more expensive. However, if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a SJU to KSM flight and hotel package?
Compared with arranging flights and hotels separately, booking a SJU to KSM flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place takes the hassle out of planning your trip. Just pick your flights and select from our extensive range of hotels, then personalize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to St. Marys Airport (KSM)?
Typically, you can modify or cancel your SJU to KSM flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like further details, head to our Customer Service portal.

Travel information

Origin airport
Luis Munoz Marin Intl.
Destination airport
St. Marys
Distance
5326 mi

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San Juan to St. Marys Flights

The cheapest times to fly from San Juan to St. Marys

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Juan to St. Marys are during the month of . You can find some of the cheapest flights from San Juan to St. Marys with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to St. Marys

Sunday is one of the best days to book for cheap flights from San Juan to St. Marys: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Juan to St. Marys

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Juan to St. Marys in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Juan to St. Marys flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Juan to St. Marys airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Juan to St. Marys Flights

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*Available to One Key members.